Means for supporting oscillating masses



Sept. 1933- T. VON MELCZER 1,927380 MASSES Patented Sept. 19, 1933 MEANS FOR SUPPOBTING OSCILLATING' v v MASSES Tilior von Melczer, Budapest, Hungary 'Aliplieation June 23} 1931, Se1ial No. 546,414, and in Hungztry Ju ne 25, 1930. Renewed July 5 Claims. (C1. 30s2) Y This invention relates to an arrangement for supporcingoscillaiiing masses in a practically frictionless manner. The new arrangement is more particularly suitable for measuring instru- 5 ments and thelike, where, fo1 the purpose 0f ensuring 1;he greatzst pssible accuracy, the resistarmes due to friction have to be reduced 130 a minimum.

- In the arrangement according to the invention the oscillating masses are supported a1ong an edge which bears against its supporting body along a straight line. There are known arrangements in which, With the same object in view, tl1e oscillating masses are supported in a point and others, in which they are Supported along a straight line. These arrangements, h0wever, have the disadvantage that the means of support gives a sure support in general only with respect to forces acting in a single definite di rection, but does not suffice for the support of 0r for withstancling forces acting in other directions.

This disadveintage is overcome in the arrangement according 130 the invention, which is suitm able for the support cf oscillating masses, that is to say, masses in which the forces may aal: in any direction 011 the means of support.

l The new arrangement consists subSsantially of at least two coaxial, helical bodies Which niake '30 contact With one another along their common 140 of a known arrangement,

Fig. 3 a plan view and Figs. 4 and 5 two different cross-sections of a constructional form of the arrangement according 150 the invention,

Fig. 5 a plan view, Fig. 7 a longitudinal section and Fig. 8 a cross-section of another comstructional form of the invention.

In Figs. 1 and. 2 A is a bar having a semicircular cross-section and B a bar having an acute segment-shapecl cross-section. The bar B 1ests a1ong its edge C on the bar A. If the bar A be helcl rigidly and. the oscillating masses be connected to the bar B, the oscillation takes place in a known manner, practically without friction about the edge C when the forces act as nearly as possible perpendicularly with respect to the supporting surface D, so that no alppreciable lateral thrust is produced.

If, however'the two bars A and B be twisted with the same amount of twist about the edge C as th e common' axis, the arrangement according to Fig. 3 results, th e cross-sections II and. IIII cf whlch ateshown' in Figs; 4 and 5. The straight line C, that is, the line of contact of the two bars, is now the geometrical axis of the two helical bodies A and B and still forms the axis of the oscillations. Owing, however, to the helical form of the two bodies A and B, it is possible to load the body B with forces acting in any dire0tion, while the llne of contact cannot become displaced.

The amplituole of the rocking motions is determined by the width of the gap E or the size of the angle 0c.

Figs. 6, 7 and 8 show another constructional form with ribbon-shaped helical bodies A and B, which have the Same pitch and are of difierent thickness a and b and are inserted one in the other. In the example shown the helical body A hasa somewhat greater diameter than.the helical body B and is supported at F and G. The oscillating mass is connected in any suitab1e manner with the helical body B. The amplitude of the rocking motion is determined by the angle 0c, which With a given pitch can be made-of any size withln' wide limits by suitably selecting the thicknesses a and b of the helical bodies The depth cf thread of each helical body is equal 120 its radius. In this constructional form the two helical bodies do not make contact with one another along an edge, but along a straight line, which, however, also lies in the common geometrical axis of the two helical bodies. The helix B, .for instance, may on the other hand. be made of trlangular cross-section, such that 113 rests along the edge on the helical body B.

The invention may also be carried into efiect with more than two helical bodies introduced 2. In an arrangement for supporting oscillating masses in a frictionless manner, two coaxial helica1 bodies of the same pitch, which have their convolutions inserted. one in the other *and make contact with one another only along their common geometrical axis and. a1e separated from one another by.continuousgaps, one helical body being adapted to support the oscillating mass and the other helical body 130 form the. support for the first-named helical body as and for the purpose set forth.

3. In an arrangement for suppor.ting .oscillafcing masses in a frictionless manner, two coaxial helical bodies 013 the same pitch, which have their convolutions inserted one in the other anc1 *m.ke

contact with one another -only=along theincommon geometrical axis, thedepth of*thr ead of each helical body being equal to its radius, and the two helical bodies being separated from one another by continuous gaps one helica1 body being adapted to .support ihescillating. mass arid the Othmar hlicxl' bodyiofo'rm the .support for the-firstnarned helic'al' bddyas an'difor the .purpose set forth.

.4. Inanarrangement for supporting oscillat- .ing -masses.ina.frictionless manner, two coaxial helical bodies. f the same pitoh, -Which have ;gaps, one helical-.body being adapted to support themscillating mass andthe other' helica1 body to form. the support for the first-named helical y body, as and f01 the purpose set forth.

'-5. In an arrangement for supporting oscillat- .ing-masses in a frictionless manner, two coaxial "helical bodies of the same pitch, which have their convolutions inserted one in the other anti make contactwith one another only a1ong their common: geometrical axis, the depth of thread 0f eachhelical body being equa1 to its radius,

- adaptd to suppo'rt the.oscillating mass.and.the

o'ther; he1icl body to f0rm.the. support for.jthe first-named he1ica11bojdy. as. and. f012 the purpose setforth.

TIBOR von MELCZER. 

